33481244021 has 2 divisors, whose sum is σ = 33481244022. Its totient is φ = 33481244020.

The previous prime is 33481243981. The next prime is 33481244039. The reversal of 33481244021 is 12044218433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33085791025 + 395452996 = 181895^2 + 19886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33481244021 is a prime.

It is a super-2 number, since 2×33481244021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33481244081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16740622010 + 16740622011.

It is an arithmetic number, because the mean of its divisors is an integer number (16740622011).

Almost surely, 2^33481244021 is an apocalyptic number.

It is an amenable number.

33481244021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33481244021 is an equidigital number, since it uses as much as digits as its factorization.

33481244021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 33481244021 in words is "thirty-three billion, four hundred eighty-one million, two hundred forty-four thousand, twenty-one".